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android / platform / external / libdisplay-info / d40a892
commitd40a89262d2d4207e45e175385e4fc5fe9faac75[log] [tgz]
authorSimon Ser <contact@emersion.fr>Fri Jun 17 09:31:13 2022 +0200
committerSimon Ser <contact@emersion.fr>Fri Jun 17 10:11:20 2022 +0200
tree4fd3d560e2bbea52912a733beb7e9a2099dabb49
parent4a4ee90888f3f4186402148d3847fe4c9cbf5d2c [diff]
edid: document that DTD size in mm can be unset

According to table 3.21 note 17, these fields should be set to zero
for some sinks, e.g. front projectors.

edid-decode hides the size from its output if both fields are zero.

Signed-off-by: Simon Ser <contact@emersion.fr>
2 files changed
tree: 4fd3d560e2bbea52912a733beb7e9a2099dabb49
  1. include/
  2. test/
  3. .editorconfig
  4. .gitlab-ci.yml
  5. di-edid-decode.c
  6. edid.c
  7. info.c
  8. libdisplay-info.map
  9. LICENSE
  10. meson.build
  11. README.md
README.md

libdisplay-info

EDID and DisplayID library.

Goals:

  • Provide a set of high-level, easy-to-use, opinionated functions as well as low-level functions to access detailed information.
  • Simplicity and correctness over performance and resource usage.
  • Well-tested and fuzzed.

Contributing

Open issues and merge requests on the GitLab project.

In general, the Wayland contribution guidelines should be followed. In particular, each commit must carry a Signed-off-by tag to denote that the submitter adheres to the Developer Certificate of Origin 1.1. This project follows the freedesktop.org Contributor Covenant.

Building

libdisplay-info is built using Meson. It has no dependencies.

meson build/
ninja -C build/

Testing

The low-level EDID library is tested against edid-decode. test/data/ contains a small collection of EDID blobs and diffs between upstream edid-decode and our di-edid-decode clone. Our CI ensures the diffs are up-to-date. A patch should never make the diffs grow larger. To add a new EDID blob or update a diff, use test/edid-decode-diff.sh test/data/<edid>.

Fuzzing

To fuzz libdisplay-info with AFL, the library needs to be instrumented:

CC=afl-gcc meson build/
ninja -C build/
afl-fuzz -i test/data/ -o afl/ build/di-edid-decode